How do we know that believers will be free from sin?

The assurance that believers will be free from sin is deeply rooted in the biblical promise of complete sanctification. As described in Revelation 14:4, those redeemed are without fault, indicating that they will eventually experience a state of perfection. The transformation into Christ's likeness signifies not only freedom from sin but also the absence of any temptation or internal struggle with evil. This profound state of holiness is a culmination of God's redemptive work in believers’ lives, where every trace of sin will be eradicated, leaving believers in a state of absolute purity.